- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
A chemical in the brain that aids in the transfer of electrical stimulus between the synaptic end of a axon to the dentrite of another.
On stardate 45944 while under the influence of the Kataan probe, Captain Jean-Luc Picard had increased activity neurotransmitter output.